X-ray fluorescence analysis of gunshot residue

SARAN, A; GUALPA, J; MUCH, D; SANCHEZ ORMACHEA, JP; WILBERGER, D; MERINI, LJ

Gaceta Internacional de Ciencias Forenses

Universitat de València

Lugar: Valencia; Año: 2022 p. 9 - 15

2174-9019

Several analytical techniques are available for forensic scientists to perform the reconstruction of a shooting incident. Among them, the analysis of gunshot residues typical elements, as Pb, Ba and Sb, are the most frequent. Investigation of its presence on the body from the victim or a suspect can provide crucial information regarding the incident. In this work we propose the use of X-ray fluorescence for detecting gunpowder residues on the skin. The analysis was focused in the relationship of these elements, mainly on the hands and face of a handgun shooter. An experiment was performed in the forensic laboratory shooting room, using commercial carbon stubs for sampling the hand and face skin of a shooter firing a 9 mm pistol. Results indicate a clear correlation between samples taken from both hands after firing a 9 mm pistol in relationship to Pb an Ba presence. The XRF instrument proved to be a quick and easy tool to detect inorganic components as a screening for GSR on hands.